未遂【みすい】
failed attempt (at a crime, suicide, etc.)
遂行【すいこう】
accomplishment, execution
遂げる【とげる】
to accomplish, to achieve, to carry out, to arrive at (a certain outcome), to come to, to end with
成し遂げる【なしとげる】
to accomplish, to finish, to fulfill
完遂【かんすい】
successful execution, accomplishment, completion, fulfillment, carrying through